3 // Copyright (C) 2005-2021 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the terms
7 // of the GNU General Public License as published by the Free Software
8 // Foundation; either version 3, or (at your option) any later
11 // This library is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
29 // notice appears in all copies, and that both that copyright notice
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32 // representation about the suitability of this software for any
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37 * @file binary_heap_/erase_fn_imps.hpp
38 * Contains an implementation class for a binary_heap.
41 #ifdef PB_DS_CLASS_C_DEC
48 for (size_type i = 0; i < m_size; ++i)
49 erase_at(m_a_entries, i, s_no_throw_copies_ind);
53 const size_type new_size = resize_policy::get_new_size_for_arbitrary(0);
54 entry_pointer new_entries = s_entry_allocator.allocate(new_size);
55 resize_policy::notify_arbitrary(new_size);
56 s_entry_allocator.deallocate(m_a_entries, m_actual_size);
57 m_actual_size = new_size;
58 m_a_entries = new_entries;
64 PB_DS_ASSERT_VALID((*this))
70 erase_at(entry_pointer a_entries, size_type i, false_type)
72 a_entries[i]->~value_type();
73 s_value_allocator.deallocate(a_entries[i], 1);
79 erase_at(entry_pointer, size_type, true_type)
87 PB_DS_ASSERT_VALID((*this))
88 _GLIBCXX_DEBUG_ASSERT(!empty());
91 erase_at(m_a_entries, m_size - 1, s_no_throw_copies_ind);
92 resize_for_erase_if_needed();
93 _GLIBCXX_DEBUG_ASSERT(m_size > 0);
96 PB_DS_ASSERT_VALID((*this))
100 template<typename Pred>
101 typename PB_DS_CLASS_C_DEC::size_type
105 PB_DS_ASSERT_VALID((*this))
107 typedef typename entry_pred<value_type, Pred, _Alloc, simple_value>::type
110 const size_type left = partition(pred_t(pred));
111 _GLIBCXX_DEBUG_ASSERT(m_size >= left);
112 const size_type ersd = m_size - left;
113 for (size_type i = left; i < m_size; ++i)
114 erase_at(m_a_entries, i, s_no_throw_copies_ind);
118 const size_type new_size =
119 resize_policy::get_new_size_for_arbitrary(left);
121 entry_pointer new_entries = s_entry_allocator.allocate(new_size);
122 std::copy(m_a_entries, m_a_entries + left, new_entries);
123 s_entry_allocator.deallocate(m_a_entries, m_actual_size);
124 m_actual_size = new_size;
125 resize_policy::notify_arbitrary(m_actual_size);
132 PB_DS_ASSERT_VALID((*this))
139 erase(point_iterator it)
141 PB_DS_ASSERT_VALID((*this))
142 _GLIBCXX_DEBUG_ASSERT(!empty());
144 const size_type fix_pos = it.m_p_e - m_a_entries;
145 std::swap(*it.m_p_e, m_a_entries[m_size - 1]);
146 erase_at(m_a_entries, m_size - 1, s_no_throw_copies_ind);
147 resize_for_erase_if_needed();
149 _GLIBCXX_DEBUG_ASSERT(m_size > 0);
151 _GLIBCXX_DEBUG_ASSERT(fix_pos <= m_size);
153 if (fix_pos != m_size)
154 fix(m_a_entries + fix_pos);
156 PB_DS_ASSERT_VALID((*this))
162 resize_for_erase_if_needed()
164 if (!resize_policy::resize_needed_for_shrink(m_size))
169 const size_type new_size = resize_policy::get_new_size_for_shrink();
170 entry_pointer new_entries = s_entry_allocator.allocate(new_size);
171 resize_policy::notify_shrink_resize();
173 _GLIBCXX_DEBUG_ASSERT(m_size > 0);
174 std::copy(m_a_entries, m_a_entries + m_size - 1, new_entries);
175 s_entry_allocator.deallocate(m_a_entries, m_actual_size);
176 m_actual_size = new_size;
177 m_a_entries = new_entries;
184 template<typename Pred>
185 typename PB_DS_CLASS_C_DEC::size_type
190 size_type right = m_size - 1;
192 while (right + 1 != left)
194 _GLIBCXX_DEBUG_ASSERT(left <= m_size);
196 if (!pred(m_a_entries[left]))
198 else if (pred(m_a_entries[right]))
202 _GLIBCXX_DEBUG_ASSERT(left < right);
203 std::swap(m_a_entries[left], m_a_entries[right]);